GET A NEW COACH:
Talk to your coach first and explain to him how most people find that Conference and State are more important than 5 team invites in early April. Tell him you'd be more than willing to double or triple during these times, but only do so earlier in the year to get a quality workout to prepare for late season success. If he doesn't understand this, fake an injury and train secretly until season's end.
Fake an injury? Thats taking the easy way out.